Solar heating systems are widely used in several European countries for domestic hot water heating, and in the past decade, an increasing number of solar combined space and hot water heating systems (typically referre...
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ISBN:
(纸本)9780791854686
Solar heating systems are widely used in several European countries for domestic hot water heating, and in the past decade, an increasing number of solar combined space and hot water heating systems (typically referred to as "combisystems") have begun to take precedence. In Canada, however, the majority of all residential solar thermal installations are for heating domestic hot water. To date, various combisystem configurations have been investigated under the auspices of the international Energy Agency, Task 26 and Task 32. Within these tasks, various system configurations were modelled and test procedures developed to allow standard performance evaluations to be conducted. this work, although extensive, has limited application within the North American context. At present, little research has been conducted on the applicability of these systems for residential housing. In particular, due to Canada's more severe winters, larger solar collector arrays would be required to significantly contribute to the space heating load. this has drawbacks, as much of the solar capacity would not be utilized during the summer, leading to poor economic performance and possible overheating that could accelerate degradation or scald occupants. therefore, there is a need to optimize the configuration of solar combisystems to avoid over-sizing while maximizing the utilization of solar energy in a safe and economic manner. this paper presents a review of the current literature on solar combined space and domestic hot water heating systems, with a particular emphasis on the work which has been conducted by the international Energy Agency. In addition, a review of combined space and domestic hot water systems currently installed in Canada are also discussed.
In this paper we present a social platform that empowers real-life social experiences by using the crowd to help people discover interesting events around a particular location and make the best of the actual experien...
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ISBN:
(纸本)9781467327404;9781467327404
In this paper we present a social platform that empowers real-life social experiences by using the crowd to help people discover interesting events around a particular location and make the best of the actual experience. We demonstrate how current systems cover only partially the social and individual motivations on deciding and teaming up for events, and propose i) a system of implicit and explicit incentives that rewards intention and experience sharing within circles based on friendship or interests and ii) a discovery algorithm that combines the importance of coming along with friends withthe personal interests to recommend events. the resulting platform has been applied to generic events as well as domain-specific ones such as shows in movie theaters.
the proceedings contain 33 papers. the topics discussed include: the evaluation of performance in flow label and non flow label approach based on IPv6 technology;the teaching of geography using dynamic geometry softwa...
the proceedings contain 33 papers. the topics discussed include: the evaluation of performance in flow label and non flow label approach based on IPv6 technology;the teaching of geography using dynamic geometry software;program assessment via a capstone project;applying MDA in developing intermediary service for data retrieval;cloud computing interoperability approaches - possibilities and challenges;data model for consortial circulation in libraries;a review of disc scrubbing and intra disc redundancy techniques for reducing data loss in disc file systems;protection of web applications using aspect oriented programming and performance evaluation;robust mouldable scheduling using application benchmarking for elastic environments;analyses of QoS routing approach and the starvation's evaluation in LAN;and implementation and evaluation of a sleep-proxy for energy savings in networked computers.
Migration of parents, in pursuit of 'a better life', has deep roots in Caribbean history and culture. However, the separation from children that results means that care gets provided through a transnational ne...
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ISBN:
(纸本)9781450312240
Migration of parents, in pursuit of 'a better life', has deep roots in Caribbean history and culture. However, the separation from children that results means that care gets provided through a transnational network of caregivers and devices. In this paper we describe how mobile phones in particular have entered a complex care network and while they support some communications they have also contributed to many of the difficulties associated with migration. On the basis of our observations, we conclude with a call for future Ubicomp research into family communication to look to support parenting by considering caregiving networks as wider than just the family. Moreover, this study contributes to our thinking about what 'more' means when introducing additional technologies in family and care networks and their ability to reinforce or shift power structures in the networks in which they are embedded.
the article introduces the notion of dynamic indices as centrality measures to analyse how the importance of nodes changes in future time in dynamic networks. In particular, the dynamic closeness, dynamic graph, dynam...
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Withthe growing body of qualitative research on HCI and social computing, it is natural that researchers may choose to conduct that research in a mediated fashion-over telephone or computer networks. In this paper we...
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ISBN:
(纸本)9781450314862
Withthe growing body of qualitative research on HCI and social computing, it is natural that researchers may choose to conduct that research in a mediated fashion-over telephone or computer networks. In this paper we compare three different qualitative data collection technologies: phone, instant message (IM), and email. We use quantitative analysis techniques to examine the differences between the methods specifically concerning word count and qualitative codes. We find that there are differences between the methods, and that each technology has affordances that impact the data. Although phone interviews contain four times as many words on average as email and IM, we were surprised to discover that there is no significant difference in number of unique qualitative codes expressed between phone and IM.
the social world that most of us navigate effortlessly can prove to be a perplexing and disconcerting place for individuals with autism. Interactive tools to teach social skills that are personalized to the individual...
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ISBN:
(纸本)9781450310154
the social world that most of us navigate effortlessly can prove to be a perplexing and disconcerting place for individuals with autism. Interactive tools to teach social skills that are personalized to the individual's needs show promise, but it is challenging to author them. We describe the design, development, and preliminary evaluation of an approach to using human computation that enables the creation of models of complex and interesting social scenarios, possible obstacles that may arise in those scenarios, and potential solutions to those obstacles. Our preliminary evaluation of the models confirms that these models have the potential to help an author create a social skills instructional module. Copyright 2012 ACM.
Multi-touch, wall-sized displays afford new forms of collaboration. Yet, most data on collaboration with multi-touch displays come from tabletop settings, where users often sit and where space is a limited resource. W...
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this study investigates the data preparation process for predictive modelling of the evolution of complex networked systems, using an e-mail based social network as an example. In particular, we focus on the selection...
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ISBN:
(纸本)9780769548487;9781467356381
this study investigates the data preparation process for predictive modelling of the evolution of complex networked systems, using an e-mail based social network as an example. In particular, we focus on the selection of optimal time window size for building a time series of network snapshots, which forms the input of chosen predictive models. We formulate this issue as a constrained multi-objective optimization problem, where the constraints are specific to a particular application and predictive algorithm used. the optimization process is guided by the proposed Windows Incoherence Measures, defined as averaged Jensen-Shannon divergences between distributions of a range of network characteristics for the individual time windows and the network covering the whole considered period of time. the experiments demonstrate that the informed choice of window size according to the proposed approach allows to boost the prediction accuracy of all examined prediction algorithms, and can also be used for optimally defining the prediction problems if some flexibility in their definition is allowed.
In this paper, we propose a human mobility sensing system simulator called HumanS. HumanS is a multi-agent simulator that works with geographic information system (GIS). It models realistic movement of pedestrians and...
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